Question

QUESTION 5 A particular storm sewer in the GTA has been noted to have flows which decline exponentially after maximum flows have been reached. (This would be after a rainstorm.) If the peak flow in the sewer was 1.35 cubic metres per second and it declined after that peak at 379 every 6 hours, how much flow could be expected in the sewer 24 hours after the peak was reached? Provide your answer as a decimal value with two decimal digits. Do not show any units with your answer.

Answer 1

Let a= Ae-bt be the model. Given at t=0 ca 1.35 A é o = 1.35 1-35 * A 4 Also at 0.4995 t = 6 @ 37% X1.35 - 6Ь 0.4995 1.35 cs Scanned with CamScanner

be N --/ 0.1657 HA 0.49gs 1.35 .o. 1657t 1.35 e é. alt) - a (24) -0.16 5 7 X 24 1.35 e D.03 CS Scanned with CamScanner